Moscovium

Moscovium is a synthetic chemical element; it has symbol Mc and atomic number 115. It was first synthesized in 2003 by a joint team of Russian and American scientists at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. In December 2015, it was recognized as one of four new elements by the Joint Working Party of international scientific bodies IUPAC and IUPAP. On 28 November 2016, it was officially named after the Moscow Oblast, in which the JINR is situated.[8][9][10]

Quick facts: Moscovium, Pronunciation, Mass number, Moscov... ▼

Moscovium, ₁₁₅Mc

Moscovium
Pronunciation	/mɒˈskoʊviəm/ ​(mos-SKOH-vee-əm)
Mass number	[290]
Moscovium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Bi ↑ Mc ↓ (Uhe) flerovium ← moscovium → livermorium
Atomic number (Z)	115
Group	group 15 (pnictogens)
Period	period 7
Block	p-block
Electron configuration	[Rn] 5f14 6d10 7s2 7p3 (predicted)[1]
Electrons per shell	2, 8, 18, 32, 32, 18, 5 (predicted)
Physical properties
Phase at STP	solid (predicted)[1]
Melting point	670 K ​(400 °C, ​750 °F) (predicted)[1][2]
Boiling point	~1400 K ​(~1100 °C, ​~2000 °F) (predicted)[1]
Density (near r.t.)	13.5 g/cm3 (predicted)[2]
Heat of fusion	5.90–5.98 kJ/mol (extrapolated)[3]
Heat of vaporization	138 kJ/mol (predicted)[2]
Atomic properties
Oxidation states	(+1), (+3) (predicted)[1][2]
Ionization energies	1st: 538.3 kJ/mol (predicted)[4] 2nd: 1760 kJ/mol (predicted)[2] 3rd: 2650 kJ/mol (predicted)[2] (more)
Atomic radius	empirical: 187 pm (predicted)[1][2]
Covalent radius	156–158 pm (extrapolated)[3]
Other properties
Natural occurrence	synthetic
CAS Number	54085-64-2
History
Naming	After Moscow region
Discovery	Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2003)
Isotopes of moscovium v e
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 286Mc synth 20 ms[5] α 282Nh 287Mc synth 38 ms α 283Nh 288Mc synth 193 ms α 284Nh 289Mc synth 250 ms[6][7] α 285Nh 290Mc synth 650 ms[6][7] α 286Nh
Category: Moscovium view talk edit | references

Moscovium is an extremely radioactive element: its most stable known isotope, moscovium-290, has a half-life of only 0.65 seconds.[7] In the periodic table, it is a p-block transactinide element. It is a member of the 7th period and is placed in group 15 as the heaviest pnictogen, although it has not been confirmed to behave as a heavier homologue of the pnictogen bismuth. Moscovium is calculated to have some properties similar to its lighter homologues, nitrogen, phosphorus, arsenic, antimony, and bismuth, and to be a post-transition metal, although it should also show several major differences from them. In particular, moscovium should also have significant similarities to thallium, as both have one rather loosely bound electron outside a quasi-closed shell. Over a hundred atoms of moscovium have been observed to date, all of which have been shown to have mass numbers from 286 to 290.